I think just about everyone would be in agreement that all of the higher end LED's can be tuned to support a healthy tank as with good water management but what I'd wonder about is hot spots where the Radion's and Kessil's overlap. At a minimum you're going to have some fun or frustration getting the 3 lighting sources dialed in.
I think your T5's alone will tone down the Kessil shimmer to your liking. My tank is much smaller at (60g cube) with one Kessil and 4 T5's (2 x coral plus & 2 x actinic) I was very surprised by how much the T5's suppress the Kessil shimmer.
My suggestion to reduce complication and expense (at least initially) would be to order the Kessils and see how they look with the T5's to start. You know you like the shimmer of the Kessil's so I'd start there, You may love it with just the Kessil's and T5 tubes and if you think it needs more, then just pick up one or two Radion's to see how that looks when added to the mix at one end of the tank.
Also, this seems like the perfect situation for renting a par meter from BRS so you have some actual data to back up what your eyes like.